On-the-job training is given in such fields as manufacturing, retail sales work, and general office work. This is sometimes supplemented by special classes run by local or national groups of employers' representatives or by night school courses. Special vocational courses are available for teaching, nursing, ancillary hospital services, graduate library work, and so on. Girls commonly enter into apprenticeships in the clothing trade and hairdressing, and occasionally in such trades as bookbinding, jewellery and watch repairing, horticulture, and mechanical dentistry. There is no encouragement given to them by the provisions of the Apprenticeship Act to consider any of the light woodworking or engineering trades, but few would be interested in any case. In most instances female apprentices are employed under the verbal agreement of an award, not under the Apprenticeship Act, and do not enter into a written contract with the employer and the local commissioner of apprenticeships. Consequently there is a less strict adherence to the obligations of the employer and the apprentice than there is in the case of boys, and so some girls become skilled operatives rather than fully trained journeywomen.